The United Arab Emirates arranged a secret meeting in January between Blackwater founder Erik Prince and a Russian close to President Vladimir Putin as part of an apparent effort to establish a back-channel line of communication between Moscow and President-elect Donald Trump, according to U.S., European and Arab officials.

The meeting took place around Jan. 11 – nine days before Trump’s inauguration – in the Seychelles islands in the Indian Ocean, officials said. Though the full agenda remains unclear, the UAE agreed to broker the meeting in part to explore whether Russia could be persuaded to curtail its relationship with Iran, including in Syria, a Trump administration objective that would likely require major concessions to Moscow on U.S. sanctions.

Though Prince had no formal role with the Trump campaign or transition team, he presented himself as an unofficial envoy for Trump to high-ranking Emiratis involved in setting up his meeting with the Putin confidant, according to the officials, who did not identify the Russian.